Oil-burning apparatus



1,620,111 March 8 1927 E. D. LEWIS OIL BURNING APPARATUS Filed April 1, 1926 2 Sheet-Sheet 1 yMarch 8, 1927.

witness E. D. LEWIS OIL BURNING APPARATUS Filed April 1I 1926 2 Sheets-Smet 2 @Roe/nego Patented Mar. 8, 1927.

UNITED STATES EDWARD n. LEWIS, or ELMIam-N'Ew Yoax.

v OIL-Bumm@ Ar'rAaATUs.

Appunti@ mea April 1, 192e.l seri'aim. 99,114.

The invention relates to improvements in oil burning apparatus, of the type in which acircular pot is providedv having a tangential inlet for air under pressure, anda fuel supply line which -'discharges into sa1d pot, said pot having a vapor escape opening in its top and a deflector under said opening. vThe invention also has reference to oil burning apparatuses in which theair is supplied by motor-driven blower blades and in which automatic controlling means are provided for the fuel.

One ob'ect of the invention is to provide a new an improved relation of gas or vapor discharge opening and deilector plate whichv will absolutely prevent the burner from making the usual roaring noise.

A further aim is to provide two blowers for furnishing the necessary air, said blowers being provided with separate motorsand being of different sizes, so that when a lowfire is desired, only the small `blower need be operated, whereas -both blowers are brought into play when a high fire.

is required. The small blower is continuously driven as-lon as the burner is in operation and by suitable means, such as a thermostatic switch, a pressure-static switch, or both, the circuit for the driving motor of the larger blower may be controlled, and a v further object is to provide a manually controlled switch for taking the motor of the large blower out of control ofthe thermostatic, pressure-static or other automatic switch, when initially starting the burner, so that onl a low lire can be operated until all parts o the burner structure become thoroughly and evenly heated. Otherwise, the burner would start operation at maximum capacity and its heating would be so rapid as to be injurious.

A still further aim of the invention is to provide automatic air-controlled means for closing the vdischarge of the large blower when the small blower is in operation, preventing any esca e of air through the casing of said large lower.

Yet another aim is to provide novel means for utilizing the passage of air to the burner lleag, to controlthe supply of fuel to said utilizing a said head, so that there is no danger of blowing'the fire out when runnin a low ire. j

The partlcular construction herein disclosed was designed primaril for use in connection with the combined c imney, furnace and ventilator shown by my U. S. Patent No. 1,573,406, and a further aim is to make novel provision for discharging some of the air travellng from the blowers toward the burner head into the air space between the fire box wall and the furnace jacket, instead ofusing the means shown in the above mentioned patent, for discharging airinto this space. v

With the foregoing in View, the invention residesin the novel subject matter hereinafter described and claimed, the description belng supplemented by the Vaccompanying drawings. l

Fig. 1 is a vertical longitudinal sectional view through an oil burning apparatus constructed in accordance with my invention.

Fig. 2 is a horizontal sectional view illustrating the motor wiring and adjuncts thereof in diagram. p Fig. 3 is a plan view of the burner head and associated parts.

Fig. 4 is a bottom plan view of the cover y plate of the burner head.

Fig. 5 is a perspective view showing certain parts Aof the fuel controlling means to be hereinafter-fully described.

n the drawings above briefly described, the numeral 6 designates a burner head which includes a pot 7 having a tangential air-inlet neck 8 and an upstanding support 9 for a centrally positioned baffle plate 10, of circular outline. lldesignate's a cover platefor the pot 7, said plate having an integral extension 12 closing the upper side of the neck 8 and provided with an appropriate deflector 13 for directing the air downwardly as it enters the pot. The lower portion or bottom 14 of this neck is preferably'raised somewhat above the bottom of the pot 7 as indicated at 14 to prevent possible outward flow of oil from the pot, before the automatic oil shut-olf may function, in case the flame should for any reason be extinguished.

The cover plate 11 of the pot 7 is formed with a discharge opening 15 for the vaporized fuel and air. Ordinarily, an opening such as this, is in concentric relation with the baie plate 10, but by extended experimentation, I have found that it is this relation which produces the objectionable roaring of the burner, and b such experimeny in vertical alinement with the peripheral edge of the plate 10, whereas the opposite end of said opening 15, is outwardly spaced beyond said peripheral edge of the plate 10. The two side edges of thev opening 15 are inwardly spa'ced from the peripheral edge of the plate 10, the side edge nearest the neck 8 being preferably spaced inwardly from said edge, a greater distance than the opposed side edge of the opening. This exact relation has been found to produce the desired results in actual ractice, but it is possible that other relations of elliptical opening and baffle plate could also produce good results.

An air supply passagel leads to the neck 8 and referably has its sides and bottom joined integrally to said neck, the top 4of said assage however being preferably formed) from a plurality of separate plates 17 to permit expansion and contraction without danger of breakage. For this same purpose, the cover plate 11 is preferably di vided into sections, the meeting edges of which are designated at 18. The outer end of the passage 16 communicates with the air outlet '19 of a dual blower casing 20. This casing, in the present showing is divided by a vertical partition 21, into a small chamber 22 and a larger chamber 23, said chambers having air inlet eyes 24 and 25 respectively. In the chamber 22, a small blower 26 is disposed, said blower having an operating motor 27. A larger blower 28 is disposed in the chamber 23 and is provided with a driving motor 29. The two motors 27 and 29 are wired in parallel and it is intended that the motor 27 shall operate continually as long as the burner is in operation, whereas provision is made for cutting the motor 29 into or out of play, as occasion mayr demand. When only the blower 26 is operating, the burner is producing only a low fire, but when both blowers 26 and 28 are in play, a high lirek with intense heat is produced.

30 and 3l designate the `current supply wires for the motor 27 t0 the usual terminals of the latter; 32 designates 'another wire from one terminal ot' motor 27 to one terminal of' motor 29, and 33 has' reference to wiring connecting the other terminals of the two motors, said wiring, in the present disclosure including a thermostatic switch 34, a pressure-static switch 35, and a manually controlled switch 36. When all of these switches areuclosed, the circuit for the motor 29 is complete. When any one of them is opened, however, this motoris `automatically cut out of operation and it will be seen that by opening' the switch 36 when initially starting the burner, the motor 29 and the blower 28 cannot function. Thus, it is possible to startI the burner only with a low fiame, thereby insuring that it shall heatup gradually and in such manner as to prevent any possibility of injury. After this initial heating has taken place, the switch 36 may be closed and the control of the motor 29 left entirely to the thermo* static and prcssure-static switches.

An oil supply pipe 37 is shown leading to the pot 7 from an emergency oil cut-ott' valve 38, which valve communicates with a flow-control valve 39, the latter receiving fuel from a strainer 40 having a fixed adjustment valve 41 for controlling the maximum amount of fuel entering the strainer,

the valves and the pipe 37, from the supply4 line 42. The pipe 37 is provided with a lateral air-collecting branch 43 which extends through one side of the passage'l and is provided with a terminal 44 which turns toward the blowers. This terminal 44 collects some of the air discharged through the passage 16 and shunts it through the pipe 37, thus insuring positive steady flow of oil to the burner head even when the control valve 39 is almost closed. Provision is made for automatically setting this valve 39 according to the strength of the air blast through the passage 16. In the present showing, the

valve 39 is provided with an operating arm 45 which is upwardly swingable to reduce the flow through said valve and is downwardly swingable to increase said iiow. To control the maximum closing ot this valve, an adjustable eccentric 46 is preferably provided. A link 47 is pivoted to and rises from the arm 45, said link being connected to a crank 48 on the en-d of a rock shaft 49 which extends across the upper portion of the air passage 16. This roc shaft is rovided preferably with two varies 50 an 51, disposed at right angles to each other as shown in Fig. 1, the larger vane 50 normally hanging about vertical, whereas vane 51 is about horizontal, .when Vonly the small blower 26 is in operation, the vanes being held in this normal position by a weight52 on an arm 53 of the shaft 49. It 1s thus 1nsured that as long as only the blower 26 is in operation, the valve 39 shall be closedfor the pur ose of opening the valve 39 as far as possi le, allowing maximum feeding of oil to the burner head.

A valve plate 54 is pivoted to the lnner end of the artition 21 to close the discharge from the ciiamber 23, when only the blower 26 is in operation, this 4valve plate being swung to the closed osition of Fig. 2 by the air nressure within tie passage 16. As soon as blower 28 comes into operation, however,

i the plate 54 is opened by the strength of the air current discharged by said blower and it remains open as'long as motor 29 is in play.

55 designates an oil receptacle operative-` ly connected with the emergency oil cutoff valve 38, and adapted to receive oil from an overflow pipe 56 which is connected with the pot 7, below the crest of the raised neck por'- tion 14. No claim is made for this arrangement of parts, but it may be explained that if the burner should become extinguished, oil from the pipe 37 will pass through the overflow pipe 36 into the receptacle 55, thus causing the latter to lower and automatically close the valve 38 in a well known manner.

As hereinbefore stated, the invention was designed primarilyy `for use in connection with a structure suchy as that shown in my U. S. Patent No. 1,573,406, although it is of course not restricted to such use. The burner head 6 is shown within the fire potv 57 of a furnace, with the passage 16 passing through the fire pot wall 58 and the furnace jacket 59. This passage is formed with an opening 60 communicating with the space between the wall 58 and the jacket 59, and a combined valve late and air collector 61 is secured to one si e of the passage 16 at the interior of the latter, the secured end of this plate 61 bein disposed between the opening 60 and the urner head, whereas its other end diverges with respect to the apertured wall of the passage 16 and is connected with an appropriate adjusting device 62. By means of this adjusting device, the plate 61 may be sprung toward or from-the wall of the passage 16 to a greateror lesser extent, lthus controlling the amount of air shunted from the passage 16 into the space between the furnace jacket vand the lire pot wall. The air entering this space performs the same functions as that which reaches the corresponding space in the patented structure. above referred to.

On account of existing advantages for the general construction shown and described, it is preferably followed. Howeveigvwit-hin the scope of the invention as claimed, variations may of course be made.

1. An oil burning apparatus comprising a burner head having an oil inlet and an inlet passage for air under pressure, oil supply means for said inlet havin a control valve, angularly disposed pivotal y mounted vanes in said air passage adapted to be suc-I cessively engaged and loperated by a blast ot' air therethrough, and operating connections between said vanes and said control valve.

2. An oil burner comprising a pot having an oil inlet and a tangential in et for air under ress ure, a circular baiiie'plate centrally is osed within said pot and s aced above its ottom, a cover plate for sai pot,

said cover plate having an elliptically shaped opening disposed above said battle plate and in excentric relation thereto.

3. An oil burner comprising a pot having an oil vinlet and a tangential inlet for air under pressure, a circular bailie late within said pot and spaced above its ottom, and a cover plate for said pot, said cover plate having an elliptical opening disposed above said baiiie plate, said elliptical o lening being elongated transversely of sai air inlet, being of greater length than the diameter of sa1d baiiie plate, and being of less width than said diameter.

4. A structure as specified in claim 3; one end of said elliptical opening being substantially in line with the peripheral edge of the baiiie plate while the other end of said elliptical opening is outwardly spaced from said peripheral edge, the side edges of said opening being inwardly spaced from said peripheral edge of saidbaflie plate.

5. Air supply means for the air inlet passage of an oil burner, said means comprising a fan housing partitioned into relatively small and large fan compartments, blower fans of relatively low and high capacity mounted in said compartments respectively. means for driving elther'the low capacity blower or both of said blowers, and means for automatically closing the outlet from the larger compartment when only the blower of small capacity is in operation.

6. In combination with a fire pot having a surrounding jacket, an oil burner within there potvand having'a. supply passage for air under pressure, said passage extending through the walls of the fire pot and jacket; an air outlet from said passage into the space between said wall and jacket, a combmed air-directing and valve late operas tively associated with said openlng to effect discharge of a greater or lesser amount of air therethrough, and means connected with said plate for adjusting the same to vary its position with regard to said opening.

7. In :m voil burning apparatus, an oil gesifying pot having a tan ential troughlike 1n1et neck and n troug -like air passage connected with said neck, together with sectional covers for said pot and said passage, a. Section of the pot cover having an 10 integral extension covering said neck.

In testimony whereof I have hereunto axed my signature.

EDWARD D. LEWIS. 

